Length of Crest when Francis Formula Discharge and Velocity is not considered Calculator

✖Francis Discharge is calculated from the empirical formula given by Francis.ⓘ Francis Discharge [Q_Fr]			+10% -10%
✖Height of Water above Crest of Weir is defined as the water surface height above crest.ⓘ Height of Water above Crest of Weir [S_w]			+10% -10%
✖Number of End Contraction 1 can be described as the end contractions acting on a channel.ⓘ Number of End Contraction [n]			+10% -10%

✖Length of Weir Crest is the measurement or extent of Weir Crest from end to end.ⓘ Length of Crest when Francis Formula Discharge and Velocity is not considered [L_w]

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Length of Crest when Francis Formula Discharge and Velocity is not considered Solution

STEP 0: Pre-Calculation Summary

Formula Used

Length of Weir Crest = (Francis Discharge/(1.84*Height of Water above Crest of Weir^(3/2)))+(0.1*Number of End Contraction*Height of Water above Crest of Weir)
L_w = (Q_Fr/(1.84*S_w^(3/2)))+(0.1*n*S_w)
This formula uses 4 Variables

Variables Used

Length of Weir Crest - (Measured in Meter) - Length of Weir Crest is the measurement or extent of Weir Crest from end to end.
Francis Discharge - (Measured in Cubic Meter per Second) - Francis Discharge is calculated from the empirical formula given by Francis.
Height of Water above Crest of Weir - (Measured in Meter) - Height of Water above Crest of Weir is defined as the water surface height above crest.
Number of End Contraction - Number of End Contraction 1 can be described as the end contractions acting on a channel.

STEP 1: Convert Input(s) to Base Unit

Francis Discharge: 8 Cubic Meter per Second --> 8 Cubic Meter per Second No Conversion Required
Height of Water above Crest of Weir: 2 Meter --> 2 Meter No Conversion Required
Number of End Contraction: 4 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

L_w = (Q_Fr/(1.84*S_w^(3/2)))+(0.1*n*S_w) --> (8/(1.84*2^(3/2)))+(0.1*4*2)

Evaluating ... ...

L_w = 2.33718865475336

STEP 3: Convert Result to Output's Unit

2.33718865475336 Meter --> No Conversion Required

FINAL ANSWER

2.33718865475336 ≈ 2.337189 Meter <-- Length of Weir Crest

(Calculation completed in 00.020 seconds)

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< Length of Crest Calculators

Length of Crest considering Velocity

LaTeX Go Length of Weir Crest = ((3*Francis Discharge with Suppressed End)/(2*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)*(Still Water Head^(3/2)-Velocity Head^(3/2))))+(0.1*Number of End Contraction*Still Water Head)

Length of Crest given Discharge Passing over Weir

LaTeX Go Length of Weir Crest = (Francis Discharge with Suppressed End*3)/(2*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)*((Height of Water above Crest of Weir+Velocity Head)^(3/2)-Velocity Head^(3/2)))

Length of Crest without considering Velocity

LaTeX Go Length of Weir Crest = ((Francis Discharge*2)/(3*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)))^(2/3)+(0.1*Number of End Contraction*Height of Water above Crest of Weir)

Length of Crest when Francis Formula Discharge and Velocity is not considered

LaTeX Go Length of Weir Crest = (Francis Discharge/(1.84*Height of Water above Crest of Weir^(3/2)))+(0.1*Number of End Contraction*Height of Water above Crest of Weir)

Length of Crest when Francis Formula Discharge and Velocity is not considered Formula

LaTeX Go

What is meant by Head?

In hydraulics, Head is a measure of the potential of fluid at the measurement point. or total energy per unit weight above a datum.

How to Calculate Length of Crest when Francis Formula Discharge and Velocity is not considered?

Length of Crest when Francis Formula Discharge and Velocity is not considered calculator uses Length of Weir Crest = (Francis Discharge/(1.84*Height of Water above Crest of Weir^(3/2)))+(0.1*Number of End Contraction*Height of Water above Crest of Weir) to calculate the Length of Weir Crest, The Length of crest when Francis formula discharge and velocity is not considered as it applies to the area of reclamation can be defined as ' The distance, measured along the axis. Length of Weir Crest is denoted by L_w symbol.

How to calculate Length of Crest when Francis Formula Discharge and Velocity is not considered using this online calculator? To use this online calculator for Length of Crest when Francis Formula Discharge and Velocity is not considered, enter Francis Discharge (Q_Fr), Height of Water above Crest of Weir (S_w) & Number of End Contraction (n) and hit the calculate button. Here is how the Length of Crest when Francis Formula Discharge and Velocity is not considered calculation can be explained with given input values -> 2.337189 = (8/(1.84*2^(3/2)))+(0.1*4*2).

FAQ

What is Length of Crest when Francis Formula Discharge and Velocity is not considered?

The Length of crest when Francis formula discharge and velocity is not considered as it applies to the area of reclamation can be defined as ' The distance, measured along the axis and is represented as L_w = (Q_Fr/(1.84*S_w^(3/2)))+(0.1*n*S_w) or Length of Weir Crest = (Francis Discharge/(1.84*Height of Water above Crest of Weir^(3/2)))+(0.1*Number of End Contraction*Height of Water above Crest of Weir). Francis Discharge is calculated from the empirical formula given by Francis, Height of Water above Crest of Weir is defined as the water surface height above crest & Number of End Contraction 1 can be described as the end contractions acting on a channel.

How to calculate Length of Crest when Francis Formula Discharge and Velocity is not considered?

The Length of crest when Francis formula discharge and velocity is not considered as it applies to the area of reclamation can be defined as ' The distance, measured along the axis is calculated using Length of Weir Crest = (Francis Discharge/(1.84*Height of Water above Crest of Weir^(3/2)))+(0.1*Number of End Contraction*Height of Water above Crest of Weir). To calculate Length of Crest when Francis Formula Discharge and Velocity is not considered, you need Francis Discharge (Q_Fr), Height of Water above Crest of Weir (S_w) & Number of End Contraction (n). With our tool, you need to enter the respective value for Francis Discharge, Height of Water above Crest of Weir & Number of End Contraction and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Length of Weir Crest?

In this formula, Length of Weir Crest uses Francis Discharge, Height of Water above Crest of Weir & Number of End Contraction. We can use 3 other way(s) to calculate the same, which is/are as follows -

Length of Weir Crest = (Francis Discharge with Suppressed End*3)/(2*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)*((Height of Water above Crest of Weir+Velocity Head)^(3/2)-Velocity Head^(3/2)))
Length of Weir Crest = ((Francis Discharge*2)/(3*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)))^(2/3)+(0.1*Number of End Contraction*Height of Water above Crest of Weir)
Length of Weir Crest = ((3*Francis Discharge with Suppressed End)/(2*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)*(Still Water Head^(3/2)-Velocity Head^(3/2))))+(0.1*Number of End Contraction*Still Water Head)

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